Magnetic resonance method

A magnetic resonance imaging apparatus for obtaining a fast dynamic image with an automatic grid of essentially orthogonally arranged grid lines by a tagging information induced over the object to be imaged, whereas

• means for obtaining a first tagging grid of orthogonal grid lines which means applies for each grid line
• a first nonselective RF pulse with a predetermined flip angle,
• an intermediate magnetic field gradient pulse in direction of the spatial modulation,
• a second nonselective RF pulse with a predetermined flip angle,
• a subsequent spoiler gradient pulse in the direction of the magnetic field gradient for slice selection, used for imaging of the object, and
• means for obtaining a second orthogonal tagging grid in the same manner by inverting one second RF pulse in one of the orthogonal directions with respect to the first RF pulse, and
• means for subtracting the first and the second tagging grids from each other to obtain a grid free of any contribution of relaxation components of magnetization, characterized in that a means is provided for producing a tagging grid in three dimensions by obtaining tagging lines in three directions, whereas the heights of the spoiler gradient pulses in the three dimensions are different to each other.

A computer program product stored on a computer usable medium for forming a fast dynamic image with an automatic grid of essentially orthogonally arranged grid lines by means of the magnetic resonance method, comprising a computer readable program means for causing the computer to control the execution of:

• a procedure for tagging information induced over the object to be imaged, whereas
• a first tagging grid of orthogonal grid lines is obtained by applying for each grid line
• a first nonselective RF pulse with a predetermined flip angle,
• an intermediate magnetic field gradient pulse in direction of the spatial modulation,
• a second nonselective RF pulse with a predetermined flip angle,
• a subsequent spoiler gradient pulse in the direction of the magnetic field gradient for slice selection, used for imaging of the object, and
• a procedure for obtaining a second orthogonal tagging grid in the same manner by inverting one second RF pulse in one of the orthogonal directions with respect to the first RF pulse, and
• a procedure for subtracting the first and the second tagging grids from each other to obtain a grid free of any contribution of relaxation components of magnetization, characterized in that there is provided a procedure for producing a tagging grid with tagging lines in three dimensions, whereas the heights of the spoiler gradient pulses in the three dimensions are different to each other.